Specifications

General Operation
VTM Series Installation and Operation Handbook
3-75
• EIT (Event Information Table) – lists the programs and information for the virtual
channels. The information includes, name, start time, and duration. Press ENT and
the UP and DOWN navigation buttons to scroll through the programs.
• EPG (Electronic Program Guide) – The EPG indicates a list of the programs and
the times the programs occur. Press ENT and the UP and DOWN navigation
buttons to scroll through the programs.
• BW (Bandwidth) – The BW screen displays the trend data, total bandwidth, and
bandwidth per program.
If DVB is the format for the stream, the tables that appear are:
• INFO (from the Service Information Table (SI))
• PAT (Program Association Table) - The PAT tells the decoder how many
programs are in a stream and points to the Program Map Tables (PMTs) that
contain the information where the parts for any given event can be found.
• PMT (Program Map Table) - The PMT points to the component video, audio, and
data streams that make up the program. Parts in this context are the video stream
(normally one), the audio streams, and the data streams.
• EIT (Event Information Table) - lists the programs for the virtual channels. Press
ENT and the UP and DOWN navigation buttons to scroll through the programs.
• CAT (Conditional Access Table) - The Condition Access Table (CAT) is the
pointer to enable the Integrated Receiver Decoder (IRD) to find the Entitlement
Management Message (EMM) associated with the CA system(s) that it uses.
• NIT (Network Information Table) – the NIT contains the information for the
transmissions of a stream in a network. Each stream is individually identified with
a network ID and a transport stream ID.
• SDT (Service Description Table) – The SDT describes services found within a
transport stream. Press ENT and the UP and DOWN navigation buttons to scroll
through the services.
• BW (Bandwidth) – The BW screen displays the trend data, total bandwidth, and
bandwidth per program.
Bandwidth and Trending Screen
The Bandwidth screen, shown in Figure 3-53, indicates the trend data, total bandwidth,
and the bandwidth per program. The top of the display is a bar graph. The far right of
the bar graph indicates the total bandwidth. The bars to the left of the total bandwidth
bar indicate the bandwidth per program.
Beneath the bar graph is a plotted chart (trending chart) that displays the bandwidth
level in mb/s over the selected time. The trending chart is displayed with the selectable
bandwidth level on the left and the selectable time on the bottom of the chart. The
trending chart can display the Total bandwidth over time, the selected program, or
NULL bandwidth. Samples are plotted in 15, 30, 45, or 60-minute intervals.